Bent coil for ducted unit

Abstract

A bent coil used in a ducted heating and cooling unit improves heat exchange. The bent coil increases the overall surface area of the coil for a given duct volume. Openings in a separation wall focus an air flow from fans towards the bent coil. Fins direct the air through the bent coil, and a net removes turbulence from the air flow prior to moving through the bent coil. The bent coil discharges air both longitudinally and laterally, eliminating the need for any additional ducting downstream from the bent coil to divert air toward the sides.

1. A ducted heating and cooling unit comprising:
 two fans moving unconditioned air towards a bent coil; 
 the bent coil, wherein said unconditioned air flows through said bent coil and outlet air is discharged from said bent coil in a first direction and a second direction different than said first direction; 
 a separation wall including two openings, wherein said separation wall is located between said two fans and said bent coil and each of said two openings substantially align with one of said two fans; and 
 a net disposed on said bent coil, wherein at least one tab attaches said net to said bent coil. 
 
     
     
       2. The ducted unit of  claim 1 , wherein said bent coil includes at least one first fin positioned within a flow of said unconditioned air. 
     
     
       3. The ducted unit of  claim 2 , wherein said at least one first fin is substantially vertical. 
     
     
       4. The ducted unit of  claim 2 , wherein said bent coil includes at least one second fin, wherein said at least one second fin is substantially transverse to said at least one first fin. 
     
     
       5. The ducted unit of  claim 4 , wherein said at least one second fin is substantially horizontal and said at least one first fin is substantially vertical. 
     
     
       6. The ducted unit of  claim 1 , wherein said net is nylon. 
     
     
       7. The ducted unit of  claim 1 , wherein said bent coil further comprises a plurality of tubes, wherein a fluid flows through said plurality of tubes to exchange heat with said unconditioned air flowing through said bent coil. 
     
     
       8. The ducted unit of  claim 1 , wherein said outlet air is discharged generally perpendicular to said bent coil. 
     
     
       9. The ducted unit of  claim 1 , wherein said first direction is generally longitudinal and said second direction is generally lateral. 
     
     
       10. The ducted unit of  claim 1 , further comprising a duct that houses said two fans, said bent coil and said separation wall, wherein said duct includes side openings, and said first direction of said outlet air flows through said side openings of said duct. 
     
     
       11. The ducted unit of  claim 1 , wherein said bent coil is a heat exchanger. 
     
     
       12. The ducted unit of  claim 1 , wherein said unconditioned air moves towards said separation wall in a substantially straight path. 
     
     
       13. A ducted heating and cooling unit comprising:
 two fans moving unconditioned air towards a separation wall; 
 the separation wall, wherein said separation wall includes two openings that direct said unconditioned air to a bent coil; 
 the bent coil, wherein said unconditioned air flows through said bent coil and outlet air is discharged from said bent coil in a first direction and a second direction different than said first direction; and 
 a net disposed on said bent coil, wherein at least one tab attaches said net to said bent coil. 
 
     
     
       14. The ducted unit of  claim 13 , wherein said net is nylon. 
     
     
       15. The ducted unit of  claim 13 , wherein said separation wall is located between said two fans and said bent coil and each of said two openings substantially align with one of said two fans. 
     
     
       16. The ducted unit of  claim 13 , further comprising a duct that houses said two fans, said bent coil and said separation wall, wherein said duct includes side openings, and said first direction of said outlet air flows through said side openings of said duct. 
     
     
       17. The ducted unit of  claim 13 , wherein said bent coil includes at least one first fin. 
     
     
       18. The ducted unit of  claim 2 , wherein said flow of said unconditioned airflow moves around said at least one first fin. 
     
     
       19. The ducted unit of  claim 4 , wherein said flow of said unconditioned airflow moves around said at least one second fin. 
     
     
       20. The ducted unit of  claim 17 , wherein said flow of said unconditioned airflow moves around said at least one first fin. 
     
     
       21. The ducted unit of  claim 1 , wherein a perimeter of each of said two openings substantially aligns with a perimeter of each of two fan openings. 
     
     
       22. The ducted unit of  claim 13 , wherein a perimeter of each of said two openings substantially aligns with a perimeter of each of two fan openings. 
     
     
       23. The ducted unit of  claim 1 , wherein said separation wall includes a central portion for impeding airflow to a bent portion of said bent coil. 
     
     
       24. The ducted unit of  claim 13 , wherein said separation wall includes a central portion for impeding airflow to a bent portion of said bent coil. 
     
     
       25. The ducted unit of  claim 1 , wherein a surface of said separation wall defines a surface transverse to said flow of said unconditioned airflow. 
     
     
       26. The ducted unit of  claim 13 , wherein a surface of said separation wall defines a surface transverse to said flow of said unconditioned airflow.